Editor: Revert [54159].

Reverting changeset due to failing PHPUnit tests. Tests pass without changeset [54156], but fail with it. Reverting to explore why in the original PR after rebasing.

See #56467.
Built from https://develop.svn.wordpress.org/trunk@54160


git-svn-id: http://core.svn.wordpress.org/trunk@53719 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -4026,13 +4026,6 @@ function create_initial_theme_features() {
 			'show_in_rest' => true,
 		)
 	);
-	register_theme_feature(
-		'disable-layout-styles',
-		array(
-			'description'  => __( 'Whether the theme disables generated layout styles.' ),
-			'show_in_rest' => true,
-		)
-	);
 	register_theme_feature(
 		'editor-color-palette',
 		array(